fix: misspell on return code

Author: bekhzod91

Diff for: CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 ### Fixed
+- Error code on socket error (#279).
 
 ## 0.11.0 - 2022-12-31
 

Diff for: tarantool/connection.py

@@ -1168,7 +1168,7 @@ def check():  # Check that connection is alive
                 sock_fd = self._socket.fileno()
             except socket.error as e:
                 if e.errno == errno.EBADF:
-                    return errno.ECONNRESETtuple_value
+                    return errno.ECONNRESET
             else:
                 if os.name == 'nt':
                     flag = socket.MSG_PEEK